🔧 Blazer - Rear Brake Pads & Rotor Replacement

On your Blazer, the rear brake pads clamp the rotor to slow the vehicle. When pads get thin or rotors get grooved/rust-lipped, you’ll want to replace pads and rotors together so braking stays smooth and quiet.

Difficulty Level: Intermediate | Estimated Time: 2-4 hours

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⚠️ Safety & Precautions

• 🛑 Support the Blazer on jack stands; never work under a vehicle held only by a jack.
• 🔥 Brakes can be very hot; let everything cool before touching the caliper/rotor.
• 🧯 Use brake cleaner only in a well-ventilated area; avoid breathing dust.
• ⚡ If your Blazer has an electronic parking brake (EPB) (a dashboard button), you must retract the EPB before compressing the rear pistons or you can damage the caliper.
• 🔋 Keep the key fob away from the vehicle while working so the EPB can’t auto-apply.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Lug nut socket (22mm)
• Breaker bar (1/2")
• Torque wrench (20-200 ft-lbs)
• Ratchet (3/8")
• Socket set (metric)
• Wrench set (metric)
• Torx T30 bit
• Flat-blade screwdriver
• Brake caliper piston compressor tool (specialty)
• Brake caliper hanger hook
• Wire brush
• Rubber mallet
• Dial indicator with magnetic base (specialty)
• Brake cleaner spray
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear brake pad set - Qty: 1
• Rear brake rotors - Replace in pairs - Qty: 2
• Rear brake hardware kit (clips/shims) - Qty: 1
• Brake lubricant (silicone/ceramic) - Qty: 1
• Threadlocker (medium strength) - Qty: 1
• Brake fluid (DOT 3) - Qty: 1 quart

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📋 Before You Begin

• 🧱 Park on level ground, steering straight, and place wheel chocks at the front wheels.
• 🅿️ If you have a traditional foot/hand parking brake, set it. If you have EPB, leave it released for service.
• 🔎 Check the brake fluid level in the reservoir; it may rise when pistons are pushed back. If it’s near “MAX,” remove a little with a clean syringe (don’t spill on paint).
• 🧰 If your Blazer has EPB, plan on using a scan tool (specialty) to retract the parking brake motors before you compress the pistons.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Confirm EPB type

• Look for an EPB button (usually near the shifter). If you have it, you must retract the EPB with a scan tool before compressing the pistons.
• EPB = motorized parking brake inside the caliper.

Step 2: Loosen rear wheel lug nuts

• Use a 22mm lug nut socket and breaker bar (1/2") to loosen each rear wheel lug nut about 1/2 turn.

Step 3: Lift and support the rear

• Use a floor jack (rated 3-ton minimum) to lift at the approved rear lift point.
• Set the vehicle onto jack stands (rated 3-ton minimum) and lightly shake to confirm it’s stable.
• Remove the wheels using the 22mm lug nut socket.

Step 4: Retract the EPB (if equipped)

• If EPB-equipped: use an OEM-level scan tool (specialty) and run the rear parking brake service function (retract/maintenance mode).
• Do not proceed until the EPB motors are fully retracted.

Step 5: Remove the caliper

• Turn the steering as needed to get better access, then use a ratchet (3/8") with the correct metric socket to remove the two rear caliper guide pin bolts.
• Lift the caliper off the bracket. Use a brake caliper hanger hook to hang it from the suspension.
• Do not let the caliper hang by the brake hose.

Step 6: Remove old pads and hardware

• Pull the old pads out by hand. Use a flat-blade screwdriver if they’re stuck.
• Remove the pad clips/hardware from the bracket.

Step 7: Remove the caliper bracket

• Use a breaker bar (1/2") and the correct metric socket to remove the caliper bracket bolts.
• Torque to 155 Nm (114 ft-lbs) on reassembly.

Step 8: Remove the rotor

• If the rotor has a retaining screw, remove it using a Torx T30 bit.
• Torque to 10 Nm (7 ft-lbs) on reassembly (retaining screw).
• Remove the rotor. If it’s seized, tap around the hat area using a rubber mallet.

Step 9: Clean and prep the hub

• Use a wire brush to clean rust off the hub face (where the rotor sits flat).
• Spray with brake cleaner spray and wipe clean.
• A clean hub helps prevent brake pulsation.

Step 10: Install the new rotor

• Clean both sides of the new rotor using brake cleaner spray to remove packaging oil.
• Install the rotor onto the hub.
• If equipped, reinstall the retaining screw using a Torx T30 bit and Torque to 10 Nm (7 ft-lbs).

Step 11: Check rotor runout (recommended)

• Mount a dial indicator with magnetic base (specialty) and measure rotor runout.
• If runout is excessive, remove rotor, re-clean hub, and re-seat rotor (sometimes indexing the rotor helps).

Step 12: Reinstall the caliper bracket with new hardware

• Install the new pad clips/hardware into the bracket.
• Reinstall the bracket using the correct metric socket and apply threadlocker (medium strength) to clean bolt threads.
• Torque to 155 Nm (114 ft-lbs).

Step 13: Compress the rear caliper piston

• Use a brake caliper piston compressor tool (specialty) to slowly push the piston fully back into the caliper.
• Watch the brake fluid reservoir while compressing; do not let it overflow.
• If EPB-equipped and the piston won’t compress smoothly, stop and re-check EPB retraction with the scan tool.

Step 14: Install new pads and reinstall the caliper

• Apply a thin film of brake lubricant (silicone/ceramic) where the pads slide on the hardware (avoid pad friction material and rotor face).
• Install the new pads into the bracket.
• Reinstall the caliper over the pads and start the guide pin bolts by hand.
• Use a ratchet (3/8") with the correct metric socket to tighten the guide pin bolts.
• Torque to 35 Nm (26 ft-lbs).

Step 15: Reinstall wheels

• Reinstall the wheels and hand-thread the lug nuts.
• Lower the vehicle using the floor jack (rated 3-ton minimum).
• Tighten lug nuts in a star pattern using a torque wrench (20-200 ft-lbs).
• Torque to 190 Nm (140 ft-lbs).

Step 16: Reactivate EPB (if equipped)

• Use the scan tool (specialty) to exit parking brake service mode (apply/learn as prompted).

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✅ After Repair

• 🦶 With the vehicle on the ground, press the brake pedal slowly 10-15 times until it feels firm (this seats the pads).
• 🅿️ Apply and release the parking brake a few times to confirm normal operation (especially if EPB-equipped).
• 🧪 Test-drive at low speed first; confirm no pulling, grinding, or warning lights.
• 🛠️ If your Blazer shows brake pad life on the cluster, reset it using the steering wheel controls: Settings > Vehicle > Brake Pad Life (wording may vary by cluster).
• 🛑 Pad bedding (recommended): make 8-10 medium stops from 40 mph to 10 mph, allowing short cool-down between stops. Avoid hard stops while pads are fresh.

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💰 DIY vs Shop Cost

Shop Cost: $550-$950 (parts + labor)

DIY Cost: $180-$420 (parts only)

You Save: $370-$530 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-3 hours.

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🎯 Ready to get started?

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